CN219774424U - High static pressure centrifugal fan blade - Google Patents

Abstract

The utility model relates to the field of fans, in particular to a high static pressure centrifugal fan blade. A high static pressure centrifugal fan blade comprises a disk body, a blade group and a wind ring, wherein the blade group is circumferentially arranged at least along the outer edge of one side end surface of the disk body, and the wind ring is connected to the outer side of the top of the blade group; an air cavity is formed between the blade group and the disc body, an air inlet is formed between the air rings, and an air outlet is formed between two adjacent blades in the blade group; the method is characterized in that: the blades are constructed into circular arc shapes which are bent towards one side along the circumferential direction of the disc body, the bending included angle of the blades formed between the outer edges of the blades and the inner edges of the blades is theta, 95 degrees < theta < 125, and the included angle of the blade gap between two adjacent blades is delta, delta < 5 degrees. The blades of the centrifugal fan blade are constructed to be denser and have larger curvature, the static pressure is improved, the wind speed is faster, and the air supply is farther.

Description

High static pressure centrifugal fan blade

Technical Field

The utility model relates to the field of fans, in particular to a high static pressure centrifugal fan blade.

Background

The centrifugal fan drives gas to flow through rotation of the centrifugal fan blades, so that the functions of exhausting, ventilating, cooling and the like are realized. The centrifugal fan is widely applied to equipment such as air conditioners, vehicles and the like, or applied to occasions such as factories, mines and the like. When the centrifugal fan works, air enters the fan from air inlets at two sides of the fan, and then the rotating impeller does work on the fan, so that the speed and the pressure of the fan are increased. As the airflow rate increases, when the force provided by the impeller is insufficient to balance the centrifugal force of the airflow rotation, the airflow is separated from the impeller and then from the fan.

At present, when the centrifugal fan blade impeller is made of plastics, the impeller is relatively wide, the bending degree is relatively large, the overall strength is poor, and the centrifugal fan blade impeller can only be applied to air conditioning units with small air quantity and low static pressure and cannot be applied to air conditioning units with large air quantity and high static pressure. The existing large-air-volume and high-static-pressure air conditioner field always adopts a centrifugal fan made of metal, and has high production cost and high noise.

Disclosure of Invention

In order to solve the above problems, an object of the present utility model is to provide a high static pressure centrifugal fan blade, wherein the blades of the centrifugal fan blade are more densely constructed and have larger curvature, the static pressure is improved, the wind speed is faster, and the air supply is further.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a high static pressure centrifugal fan blade comprises a disk body, a blade group and a wind ring, wherein the blade group is circumferentially arranged at least along the outer edge of one side end surface of the disk body, and the wind ring is connected to the outer side of the top of the blade group; an air cavity is formed between the blade group and the disc body, an air inlet is formed between the air rings, and an air outlet is formed between two adjacent blades in the blade group; the method is characterized in that: the blades are constructed into circular arc shapes which are bent towards one side along the circumferential direction of the disc body, the bending included angle of the blades formed between the outer edges of the blades and the inner edges of the blades is theta, 95 degrees < theta < 125, and the included angle of the blade gap between two adjacent blades is delta, delta < 5 degrees.

The utility model adopts the technical scheme, and the technical scheme relates to a high-static-pressure centrifugal fan blade which can be a single impeller or a double impeller, wherein the blades of the centrifugal fan blade are constructed to be denser and have larger curvature; specifically, the bending included angle of the blade formed between the outer edge of the blade and the inner edge of the blade is theta and satisfies 95 degrees < theta < 125 degrees, the bending included angle of the traditional centrifugal fan blade is more than 125 degrees, the bending degree of the blade in the scheme is larger, and the thrust of the blade to the airflow is stronger when the centrifugal air outlet is performed; further, the included angle of the blade gap between two adjacent blades is delta, delta is less than 5 degrees, namely the blades are arranged more densely, and the number of the blades is relatively larger.

Based on the parameter requirements set by the blades, the formed centrifugal fan blade improves static pressure, wind speed is faster, and air supply is farther.

In a further preferable scheme, the outer edges of the end faces of the two sides of the disc body are circumferentially arranged with blade groups, and the outer side of the top of each blade group is provided with a wind ring; and air cavities are formed between the disc body and the blade groups on two sides of the disc body. The centrifugal fan blade in the scheme adopts a double-wind wheel structure, and the air quantity is relatively larger.

Preferably, a shaft sleeve for connecting a motor shaft is constructed at the center of the disc body, and the outer side wall of the shaft sleeve is connected with the disc body at the periphery of the shaft sleeve through a plurality of radially extending reinforcing ribs. The edge of the shaft sleeve is connected and reinforced through the reinforcing ribs so as to ensure the integral strength of the shaft connection part.

Preferably, the blade groups on two sides of the tray body are arranged in a staggered mode circumferentially, so that different air outlet rules on two staggered sides are facilitated, and wind resistance is not easy to generate.

Drawings

Fig. 1 is an end view of a high static pressure centrifugal fan blade according to the present utility model.

Fig. 2 is a partial schematic view of a high static pressure centrifugal fan blade.

Fig. 3 is a schematic side view of a high static pressure centrifugal fan blade according to the utility model.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

As shown in fig. 1-3, the present embodiment relates to a high static pressure centrifugal fan blade, which comprises a disk body 1, a blade group 2 circumferentially arranged at least along the outer edge of one side end surface of the disk body 1, and a wind ring 3 connected to the outer side of the top of the blade group 2. An air cavity is formed between the blade set 2 and the disc body 1, an air inlet 4 is formed between the air rings 3, and an air outlet 5 is formed between two adjacent blades 21 in the blade set 2. The center of the disc body 1 is provided with a shaft sleeve 6 for connecting a motor shaft, and the outer side wall of the shaft sleeve 6 is connected with the disc body 1 around the shaft sleeve through a plurality of radially extending reinforcing ribs 7. The edges of the shaft sleeve 6 are connected and reinforced through reinforcing ribs 7 so as to ensure the integral strength of the shaft connection part.

In the scheme shown in the figure, the blades 21 are constructed into circular arc shapes which are bent towards one side along the circumferential direction of the disc body 1, the bending included angle of the blades 21 formed between the outer edge of each blade 21 and the inner edge of each blade 21 is theta, 95 degrees < theta < 125, and the clearance included angle of each blade 21 between two adjacent blades 21 is delta, delta < 5 degrees.

The high static pressure centrifugal fan blade can be a single impeller or a double impeller, and the blades 21 of the centrifugal fan blade are constructed to be denser and have larger curvature. Specifically, the bending included angle theta of the blade 21 formed between the outer edge of the blade 21 and the inner edge of the blade 21 meets 95 degrees < theta < 125 degrees, the bending included angle of the traditional centrifugal fan blade is more than 125 degrees, the bending degree of the blade 21 in the scheme is larger, and the thrust of the blade 21 to the airflow is stronger when the centrifugal fan blade is used for centrifugal air outlet. Further, the included angle between the gaps of the blades 21 between two adjacent blades 21 is delta, delta is less than 5 degrees, that is, the blades 21 are arranged more densely and the number is relatively larger.

Based on the parameter requirements set by the blades 21, the formed centrifugal fan blade improves static pressure, wind speed and air supply distance.

In a further preferred embodiment as shown in fig. 3, the outer edges of the two side end surfaces of the tray body 1 are all circumferentially arranged vane groups 2, and the outer side of the top of each vane group 2 is provided with a wind ring 3. And a wind cavity is formed between the disc body 1 and the blade groups 2 at two sides of the disc body. The centrifugal fan blade in the scheme adopts a double-wind wheel structure, and the air quantity is relatively larger. Further, the blade groups 2 on two sides of the disc body 1 are arranged in a staggered mode in the circumferential direction, so that the staggered air outlet rules on two sides are different, and wind resistance is not easy to generate.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model.

Claims (4)

1. A high static pressure centrifugal fan blade comprises a disc body (1), a blade group (2) and a wind ring (3), wherein the blade group (2) is circumferentially arranged at least along the outer edge of one side end surface of the disc body (1), and the wind ring (3) is connected to the outer side of the top of the blade group (2); an air cavity is formed between the blade group (2) and the disc body (1), an air inlet (4) is formed between the wind rings (3), and an air outlet (5) is formed between two adjacent blades (21) in the blade group (2); the method is characterized in that: the blades (21) are constructed into circular arcs which are bent towards one side along the circumferential direction of the disc body (1), the bending included angle of the blades (21) formed between the outer edges of the blades (21) and the inner edges of the blades (21) is theta, 95 degrees < theta < 125, and the clearance included angle of the blades (21) between two adjacent blades (21) is delta, delta < 5 degrees.

2. The high static pressure centrifugal fan blade according to claim 1, wherein: the outer edges of the end faces of the two sides of the disc body (1) are circumferentially provided with blade groups (2), and the outer side of the top of each blade group (2) is provided with a wind ring (3); a wind cavity is formed between the disc body (1) and the blade groups (2) at two sides of the disc body.

3. The high static pressure centrifugal fan blade according to claim 2, wherein: a shaft sleeve (6) for connecting a motor shaft is constructed at the center of the disc body (1), and the outer side wall of the shaft sleeve (6) is connected with the disc body (1) at the periphery of the shaft sleeve through a plurality of reinforcing ribs (7) extending radially.

4. The high static pressure centrifugal fan blade according to claim 2, wherein: blade groups (2) on two sides of the disc body (1) are arranged in a staggered mode in the circumferential direction.